Reference signal transmission using quasi co-location (QCL) resources

Abstract

A method and device in a node for wireless communications. A first node transmits a first signaling; transmits a first reference signal and a second signal through a first antenna port in a first time-frequency resource set; the first signaling is used to indicate a number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set; the first reference signal is used to demodulate the second signal; the first antenna port conforms to a first Quasi Co-Located (QCL) relation, and the first QCL relationship is one of Q candidate QCL relationships; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to indicate the first QCL relationship out of the Q candidate QCL relationships, Q being a positive integer greater than 1. The application effectively solves the signaling overhead problem of transmission configuration indication.

What is claimed is: 
     
       1. A first node for wireless communications, comprising:
 a first transmitter, transmitting a first signaling; and 
 a second transmitter, transmitting a first reference signal and a second signal through a first antenna port in a first time-frequency resource set; 
 wherein the first signaling is used to indicate the first time-frequency resource set, and the first signaling is used to indicate a number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set; the first reference signal is used to demodulate the second signal; the first antenna port conforms to a first Quasi Co-Located (QCL) relation, and the first QCL relationship is one of Q candidate QCL relationships; any of the Q candidate QCL relationships comprises at least one of a candidate reference signal or a QCL type; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to indicate the first QCL relationship out of the Q candidate QCL relationships, Q being a positive integer greater than 1; wherein a first receiver receives second information, the second information and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine Q0 candidate QCL relationship(s) out of the Q candidate QCL relationships, and the first information is used to determine the first QCL relationship out of the Q0 candidate QCL relationship(s). 
 
     
     
       2. The first node according to  claim 1 , wherein any of the Q candidate QCL relationships comprises a candidate reference signal, the first QCL relationship comprises a first candidate reference signal, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q;
 or, any of the Q candidate QCL relationships comprises a QCL type, the first QCL relationship comprises a first QCL type, and the first antenna port conforms to the first QCL type; the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q; 
 or, any of the Q candidate QCL relationships comprises a candidate reference signal and a QCL type, the first QCL relationship comprises a first candidate reference signal and a first QCL type, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q, and the first antenna port conforms to the first QCL type; the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q. 
 
     
     
       3. The first node according to  claim 1 , wherein the first signaling comprises first information, and the first information in the first signaling and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine the first QCL relationship out of the Q candidate QCL relationships;
 or, the first signaling comprises first information, and the first information in the first signaling is used to determine the first QCL relationship out of the Q candidate QCL relationships; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine whether the first information is disabled. 
 
     
     
       4. The first node according to  claim 2 , wherein the first signaling comprises first information, and the first information in the first signaling and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine the first QCL relationship out of the Q candidate QCL relationships;
 or, the first signaling comprises first information, and the first information in the first signaling is used to determine the first QCL relationship out of the Q candidate QCL relationships; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine whether the first information is disabled. 
 
     
     
       5. The first node according to  claim 4 , wherein a first receiver receives second information, the second information and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine Q0 candidate QCL relationship(s) out of the Q candidate QCL relationships, and the first information is used to determine the first QCL relationship out of the Q0 candidate QCL relationship(s). 
     
     
       6. A second node for wireless communications, comprising:
 a second receiver, receiving a first signaling; and 
 a third receiver, receiving a first reference signal and a second signal in a first time-frequency resource set; 
 wherein the first signaling is used to determine the first time-frequency resource set, and the first signaling is used to determine a number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set; the first reference signal is used to demodulate the second signal; the first reference signal and the second signal is transmitted through a first antenna port, the first antenna port conforms to a first QCL relationship, and the first QCL relationship is one of Q candidate QCL relationships; any of the Q candidate QCL relationships comprises at least one of a candidate reference signal or a QCL type; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL relationship out of the Q candidate QCL relationships, Q being a positive integer greater than 1; wherein the third receiver receives second information; the second information and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine Q0 candidate QCL relationship(s) out of the Q candidate QCL relationships, and the first information is used to determine the first QCL relationship out of the Q0 candidate QCL relationship(s). 
 
     
     
       7. The second node according to  claim 6 , wherein the first signaling comprises first information, and the first information in the first signaling and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine the first QCL relationship out of the Q candidate QCL relationships;
 or, the first signaling comprises first information, and the first information in the first signaling is used to determine the first QCL relationship out of the Q candidate QCL relationships; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine whether the first information is disabled. 
 
     
     
       8. The second node according to  claim 6 , wherein any of the Q candidate QCL relationships comprises a candidate reference signal, the first QCL relationship comprises a first candidate reference signal, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q;
 or, any of the Q candidate QCL relationships comprises a QCL type, the first QCL relationship comprises a first QCL type, and the first antenna port conforms to the first QCL type; the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q; 
 or, any of the Q candidate QCL relationships comprises a candidate reference signal, the first QCL relationship comprises a first candidate reference signal and a first QCL type, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q; the first antenna port conforms to the first QCL type; the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q. 
 
     
     
       9. The second node according to  claim 7 , wherein any of the Q candidate QCL relationships comprises a candidate reference signal, the first QCL relationship comprises a first candidate reference signal, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q;
 or, any of the Q candidate QCL relationships comprises a QCL type, the first QCL relationship comprises a first QCL type, and the first antenna port conforms to the first QCL type; the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q; 
 or, any of the Q candidate QCL relationships comprises a candidate reference signal and a QCL type, the first QCL relationship comprises a first candidate reference signal and a first QCL type, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q, and the first antenna port conforms to the first QCL type; the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q. 
 
     
     
       10. The second node according to  claim 9 , wherein the third receiver receives second information; the second information and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine Q0 candidate QCL relationship(s) out of the Q candidate QCL relationships, and the first information is used to determine the first QCL relationship out of the Q0 candidate QCL relationship(s). 
     
     
       11. A method in a first node for wireless communications, comprising:
 transmitting a first signaling; and 
 transmitting a first reference signal and a second signal through a first antenna port in a first time-frequency resource set; and 
 receiving second information; 
 wherein the first signaling is used to indicate the first time-frequency resource set, and the first signaling is used to indicate a number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set; the first reference signal is used to demodulate the second signal; the first antenna port conforms to a first QCL relationship, and the first QCL relationship is one of Q candidate QCL relationships; any of the Q candidate QCL relationships comprises at least one of a candidate reference signal or a QCL type; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to indicate the first QCL relationship out of the Q candidate QCL relationships, Q being a positive integer greater than 1; wherein the second information and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine Q0 candidate QCL relationship(s) out of the Q candidate QCL relationships, and the first information is used to determine the first QCL relationship out of the Q0 candidate QCL relationship(s). 
 
     
     
       12. The method in a first node according to  claim 11 , wherein any of the Q candidate QCL relationships comprises a candidate reference signal, the first QCL relationship comprises a first candidate reference signal, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q;
 or, any of the Q candidate QCL relationships comprises a QCL type, the first QCL relationship comprises a first QCL type, and the first antenna port conforms to the first QCL type; the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q; 
 or, any of the Q candidate QCL relationships comprises a candidate reference signal and a QCL type, the first QCL relationship comprises a first candidate reference signal and a first QCL type, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q, and the first antenna port conforms to the first QCL type, the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q. 
 
     
     
       13. The method according to  claim 12 , wherein the first signaling comprises first information, and the first information in the first signaling and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine the first QCL relationship out of the Q candidate QCL relationships;
 or, the first signaling comprises first information, and the first information in the first signaling is used to determine the first QCL relationship out of the Q candidate QCL relationships; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine whether the first information is disabled. 
 
     
     
       14. A method in a second node for wireless communications, comprising:
 receiving a first signaling; and 
 receiving a first reference signal and a second signal in a first time-frequency resource set; and 
 receiving second information; 
 wherein the first signaling is used to determine the first time-frequency resource set, and the first signaling is used to determine a number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set; the first reference signal is used to demodulate the second signal; the first reference signal and the second signal is transmitted through a first antenna port, the first antenna port conforms to a first QCL relationship, and the first QCL relationship is one of Q candidate QCL relationships; any of the Q candidate QCL relationships comprises at least one of a candidate reference signal or a QCL type; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL relationship out of the Q candidate QCL relationships, Q being a positive integer greater than 1; wherein the second information and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine Q0 candidate QCL relationship(s) out of the Q candidate QCL relationships, and the first information is used to determine the first QCL relationship out of the Q0 candidate QCL relationship(s). 
 
     
     
       15. The method according to  claim 14 , wherein any of the Q candidate QCL relationships comprises a candidate reference signal, the first QCL relationship comprises a first candidate reference signal, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q;
 or, any of the Q candidate QCL relationships comprises a QCL type, the first QCL relationship comprises a first QCL type, and the first antenna port conforms to the first QCL type; the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q; 
 or, any of the Q candidate QCL relationships comprises a candidate reference signal and a QCL type, the first QCL relationship comprises a first candidate reference signal and a first QCL type, and the first antenna port is QCL with the first candidate reference signal; the first candidate reference signal is one of M candidate reference signal(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first candidate reference signal out of the M candidate reference signal(s), M being a positive integer not greater than the Q, and the first antenna port conforms to the first QCL type, the first QCL type is one of N QCL type(s), and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine the first QCL type out of the N QCL type(s), N being a positive integer not greater than the Q. 
 
     
     
       16. The method according to  claim 15 , wherein the first signaling comprises first information, and the first information in the first signaling and the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set are used together to determine the first QCL relationship out of the Q candidate QCL relationships;
 or, the first signaling comprises first information, and the first information in the first signaling is used to determine the first QCL relationship out of the Q candidate QCL relationships; the number of time-frequency resource(s) used for the first reference signal in the first time-frequency resource set is used to determine whether the first information is disabled.